CN102672076B

CN102672076B - Device for necking grooved self-locking nut

Info

Publication number: CN102672076B
Application number: CN201210129345.8A
Authority: CN
Inventors: 虞玉华; 王四华; 梁迎辉; 胡庆宽
Original assignee: Henan Aerospace Precision Machining Co Ltd
Current assignee: Henan Aerospace Precision Machining Co Ltd
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2014-12-17
Anticipated expiration: 2032-04-28
Also published as: CN102672076A

Abstract

The invention relates to a device for necking a grooved self-locking nut. Raised press claws which are arranged on the circumference of a columnar main body apply extrusion forces at the part of the bottom of a necking groove, which is close to the center of the grooved self-locking nut, to enable the connecting end of the grooved self-locking nut to turn towards the groove mouth end in the radial direction of the grooved self-locking nut, so that the inner bore of the connecting end of the grooved self-locking nut turn is machined to be a tapered hole structure, that is, the internal thread of the connecting end of the grooved self-locking nut turn has a self-locking structure. The device solves the problem that in the prior art, the necking operation of a grooved self-locking nut free of internal thread at the groove part is difficult, and the self-locking structure is not liable to crack during the use of the grooved self-locking nut, so that the service life of the grooved self-locking nut is increased, and the service performance of the grooved self-locking nut is improved.

Description

A kind of closing device of the self-locking nut of slotting

Technical field

The self-locking nut processing technique field that the present invention relates to slot, relates in particular to a kind of closing device of the self-locking nut of slotting.

Background technology

At present, along with the develop rapidly of aerospaceplane, connect condition of work requirement more and more higher between the matrix of the engine of aerospaceplane, fluting self-locking nut is well positioned to meet the connection request between some matrix of engine.

Whether common fluting self-locking nut is processed with internal thread according to fluting place is divided into two kinds, be processed with the fluting self-locking nut of female thread structure for fluting place, by being closed up, the groove width distortion cross-notching self-locking thread at fluting place reaches the object of self-locking, this kind of closing in mode usually can make to slot deformation position of self-locking nut cracks at work, thereby fluting was lost efficacy from the self-locking property of making nut, reduced the service life of fluting self-locking nut, for slotting position without the fluting self-locking nut 1(of female thread structure as shown in Figure 1 to Figure 3), this fluting self-locking nut 1 is by offering the notch end 1-1 of several closing in groove 1-4 and the link 1-2 relative with notch end 1-1 forms, wherein, between adjacent two closing in groove 1-4 of closing in end 1-1, be provided with closing in pawl 1-5, closing in groove 1-4 has the groove bottom 1-3 between notch end 1-1 and link 1-2, adopting above-mentioned closing in mode to close up and add man-hour this fluting self-locking nut 1, although the variation of the groove width of the notch end 1-1 of this fluting self-locking nut 1 can make notch end produce throat structure, but on the inwall due to this reducing, there is no machining internal thread structure, therefore can not make this fluting self-locking nut 1 there is the function of self-locking, thereby the closing in difficulty of processing of this fluting self-locking nut 1 is strengthened, improve the manufacturing cost of product.

Summary of the invention

The invention provides a kind of closing device of the self-locking nut of slotting, be intended to solve in prior art fluting place without the large problem of fluting self-locking nut crimping difficulty of processing of female thread structure.

The technical scheme of the closing device of fluting self-locking nut of the present invention is as follows:

A kind of closing device of the self-locking nut of slotting, comprise the columnar body for insert the passage that closing in pawl surrounds from the notch end of fluting self-locking nut workpiece, in the periphery of described columnar body, convex with closing in groove for inserting fluting self-locking nut workpiece and apply the paw of extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove.

Described paw has at least two, and is evenly laid in the periphery of columnar body.

Described columnar body is cylinder or hexahedron.

The end for apply from extruding force to groove bottom of described paw is defined as pressed end, between the end face of described pressed end and side by the circular fillet surface transition of processing between two two sides.

The paw being convexly equipped with in the periphery of the present invention by columnar body applies extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove, so that the link of fluting self-locking nut workpiece radially overturns to notch end around it, thereby the endoporus of the link of the self-locking nut workpiece that makes to slot is processed into taper hole structure, the internal thread of link of self-locking nut workpiece of namely making to slot forms self-locking structure, and then solve in prior art fluting place without the large problem of fluting self-locking nut crimping difficulty of processing of female thread structure, and this self-locking structure can not crack in the use procedure of fluting self-locking nut, thereby extend the service life of fluting self-locking nut, improve the serviceability of fluting self-locking nut.

Brief description of the drawings

Fig. 1 is the perspective view of hexagonal fluting self-locking nut workpiece;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is that the A-A of Fig. 2 is to cutaway view;

Fig. 4 is the operation principle schematic diagram of embodiments of the invention;

Fig. 5 is the perspective view of embodiments of the invention;

Fig. 6 is the front view of Fig. 5;

Fig. 7 is the left view of Fig. 6.

Detailed description of the invention

The embodiment of the closing device of fluting self-locking nut of the present invention: as shown in Figures 1 to 7, three paws 3 that are evenly convexly equipped with in the periphery of this closing device by columnar body 2 and columnar body 1 form, and wherein, columnar body 2 is cylinder; Paw 3 has the pressed end 3-1 that applies extruding force for the annular groove bottom 1-3 between notch end 1-1 and link 1-2 to fluting self-locking nut workpiece 1, between the end face of this pressed end 3-1 and side, by the circular fillet surface transition of processing between two two sides, and the diameter of the minimum inscribed circle of the bottom of the circular fillet surface of the pressed end 3-1 of three paws 3 is greater than the internal diameter of the screwed hole of the link 1-2 of fluting self-locking nut workpiece 1.

The present invention in use, on the punching press end of the forcing press of first columnar body 2 being installed away from one end of the pressed end 3-1 of paw 3, and the pressed end 3-1 of paw 3 is exposed from the end face of the punching press end of forcing press, then the self-locking nut workpiece 1 of slotting passes through its notch end 1-1 inserting on this closing device, the pressed end 3-1 of paw 3 is inserted in the groove of notch end 1-1 of fluting self-locking nut workpiece 1, then starting pressure machine, make to apply extruding force near the interior edge of the groove bottom 1-3 between notch end 1-1 and the link 1-2 of pressed end 3-1 cross-notching self-locking nut workpiece 1 of paw 3, so that the link 1-2 of fluting self-locking nut workpiece 1 radially overturns to notch end 1-1 around it, thereby the endoporus of the link 1-2 of the self-locking nut workpiece 1 that makes to slot forms taper hole, the internal thread of link 1-2 of self-locking nut workpiece 1 of namely making to slot forms self-locking structure, finally take off fluting self-locking nut workpiece 1 from this closing device, completed the closing in processing of cross-notching self-locking nut workpiece 1.

The present invention in use, it is consistent that the pressed end of three paws acts on extruding force on the cannelure bottom surface of fluting self-locking nut workpiece, the distortion of all directions of link of self-locking nut workpiece of making to slot is consistent, thereby the locking that has ensured fluting self-locking nut finished product requires and self-locking requirement, and process simple and fast, the processing technology of complexity compared to existing technology, the present invention has simple to operate, advantage easy to use.

In the above-described embodiments, columnar body is cylinder, and in other embodiments, columnar body can be also other column structures such as square body, hexahedron.

In the above-described embodiments, paw has three, in other embodiments, paw also can have two or unnecessary three, the concrete quantity of paw determines according to the quantity of the groove of the notch end of fluting self-locking nut workpiece, the quantity of the groove of the notch end that namely quantity of paw can not unnecessary fluting self-locking nut workpiece.

In the above-described embodiments, this closing device is applicable to process hexagonal fluting self-locking nut, and in other embodiments, this closing device also goes for processing his self-locking nut of slotting such as bihexagonal head fluting self-locking nut.

Claims

1. the closing device of the self-locking nut of slotting, it is characterized in that: the columnar body that comprises the passage surrounding for the notch end insertion closing in pawl from fluting self-locking nut workpiece, in the periphery of described columnar body, convex with closing in groove for inserting fluting self-locking nut workpiece and apply the paw of extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove, described paw applies extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove, so that the link of fluting self-locking nut workpiece is around its radially notch end upset, thereby the endoporus of the link of the self-locking nut workpiece that makes to slot is processed into taper hole structure, also the internal thread of link of self-locking nut workpiece of just making to slot forms self-locking structure.

2. the closing device of fluting self-locking nut according to claim 1, is characterized in that: described paw has at least two, and is evenly laid in the periphery of columnar body.

3. the closing device of fluting self-locking nut according to claim 1, is characterized in that: described columnar body is cylinder or hexahedron.

4. the closing device of fluting self-locking nut according to claim 1, it is characterized in that: the end for apply extruding force to groove bottom of described paw is defined as pressed end, between the end face of described pressed end and side by the circular fillet surface transition of processing between two two sides.